散射参数建模及其在传导电磁兼容中的应用  

Scattering-Parameter Modeling and Its Applications in Conducted EMC

作　　者：赵阳[1,2] 陆婋泉[1] 颜伟[1] 董颖华[1] 邱晓晖[3] 

机构地区：[1]南京师范大学电气与自动化工程学院,南京210042 [2]东南大学毫米波国家重点实验室,南京210096 [3]中国矿业大学信电学院,徐州221116

出　　处：《南京航空航天大学学报》2010年第4期488-493,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：江苏省自然科学基金(BK2008429)资助项目;毫米波国家重点实验室开放课题基金(K200903K200803)资助项目;中国博士后基金(20080431126)资助项目

摘　　要：针对频谱仪法分析传导电磁干扰(Electromagnetic interference,EMI)的精度低、存在相位缺损且需使用功分器、信号源等辅助器件等问题,提出一种散射参数建模方法,并讨论了该方法在传导电磁兼容中的应用。散射参数建模方法不仅能够精确测定EMI噪声源内阻抗,EMI分离网络特性和EMI滤波器特性的幅值大小,而且能够提取相位信息,此外,测量过程无需借助辅助器件,降低了由辅助器件引起的测量误差。实验结果表明散射参数建模方法能够简单、快速地解决电力电子实际应用中存在的阻抗匹配问题,提高EMI分离网络和EMI滤波器特性参数测量精度,并为传导EMI噪声滤波器设计提供理论依据。The conducted electromagnetic interference（EMI） noise analysis method is presented based on lower accuracy on spectrum analyzer and lack of phase information. Besides,the additional equipment like power splitter and signal source is needed in the test.Therefore,the optimization conducted by electromagnetic interference（EMI） noise analysis method using scattering-parameter test is proposed.Experimental results show that the amplitude and the phase information of the noise source impedance,and the characterization of noise discrimination network and EMI filter can be obtained by the method without all additional equipment.The impedance match problem in power electronics application can be solved.Meanwhile,the measurement of the characterization of noise discrimination network and EMI filter has a more accurate result to support the conducted EMI noise suppression.

关 键 词：散射参数 传导性EMI 噪声源内阻抗 EMI分离网络 EMI滤波器 

分 类 号：TM461[电气工程—电器] TN03[电子电信—物理电子学]